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C. l. SELLSTONE.

LOCK AND KEY.

MPucmou mm 1an. 29. uns.

Patented Oct nil unulllll-A wenn co.. VIASHING'NN, c.

propelling caniV moved the boit to tlie limit oF movement, the lioldng tumbler drops und secures the bolt.

Two operating cams 4 and 5 are provided 5 each on a. seperate and independently rota,- tzible tube in order that the bolt may be nctuated by either of the two key mecienisms mounted on; opposite sides of the door. One of these mechanism is shown in the drawings at one side of the lock casing, alud the other is adapted to be correspondingly mounted et the o posite sideofths casing. p

T his key ,operating mechanism ismounted in e freine which comprises e bese plete 18 and a cover plete 19, the hose plate being secured upon the side of the lock easing and the cover plate being connected to the base plate by two (or more if desired) posts or arms 20, 2l shown in Figs. 2 and 4. The cover 19 is adapted to bear et its rim on the surface of the door in n manner similar to the common arrangement of door locks. 0n the plate 18 there is mounted and held ixedly e cylindrical rib or Well 22 which 25 hes openings 23, 24 (Fig. 2) in its upper or outer'edge :it diametriezilly opposite oiiits. Between the buse sind cover p etes t ere is mounted e rotatable freine heringa rotatable su Vport in these plates, one of the supports einge shank 25 which passes through n hole in the base plete 18, such hole being concentric vwith the annular rib 22, and is secured in si permanent and rigid manner to s disk 26, which is part of the rotatable freine. The other end of the seine frame is comprised by e slotted shell or head 27 Which occupies e recess iii the inner side oi the cover plete 19 and turns therein. Between this disk or plate 2G and the heed 27 are two pairs of connecting Webs 28, 29 at res ctivel}f opposite sides .of the axis eroun which the frame rotates. These Webs= with the heed and plete 2,6 and i,

shank 25 coi'npletel o, rigid lunitL supported by .beeriiig's etts osite ends. Thes'hunk 25 pessesiiit the't e`56 and is slotted so es to embrpcee cross bai-30', 'Wrliich' is .secured to.

wings 29;a`ttoothed disk, 3B, these disks having Shafts s4 and se-,respeeiiveiy which turn. inthe-surportng Wmgshnd 'earch of which go selig-age 'by spring-ss' se, vertiefende rotated by insertion of the key. B virtue of the construction described the disks lie in the seine plane but et opposite sides ot' the exis of rotation around which the freine carrying them turns, und their rims pass `through the notches 23 end 24 respectively in the stationery rib or well 22. When the circumference ot the disk crosses this Well., the rotatable ,freine is secured so that it cannot be turned. sud therefore the shank E25 cannot be caused to operete the lock. But these disks are edn )ted to be rotated by :in inserted key to bring notches 41 und 42 in their rims into registry with the cylindrical rib 2 2, whereupon the entire c-erry- 80 ing' freine moy be turned, the stationary rib then occupying the notches 41, 42 oi the disks. In order thus to rotate the disks, their edges adjacent to the notches 41 and LI2 :ire provided with alternate teeth sind H5 spares complementa] to spaces and teeth respectively provided in the cngsging edgw of the key These complementari teeth of the disks `and key nre irregular so that only n key made to tit e specific lock, exso cluding for the present the inester key for a series of locks, will be eli'ective to o erste that lock. The irregular character o these coinpleinentel teeth and Spaces is clearly indica-ted in Figs. 2 vend Ll-; and it will be 9 readily apparent that by making slight changes in the number or spec-ing or form of such teeth or any one of them, s great variety of different locks, each operable onlyl by its special ker, may be produced. 10G A change of any one of these factors in only one of the disks and of the edges of the ke): is .sufiicient to diii'erentiete one lock from another and to prevent the key adapted to one lock from operating the other lock. 165 wherefore it Will be apparent that the pos sible number of variations is almost un limited.v A

In the head 27 there is mounted and fixed a plug 44 havin :i key slot 45 which 110 may. have en lirregu ,er c :o'ntourfinV cross section complemental to a perticuler. key. body Aso as further to limit` the eliiirscter of the key which nieyfo'e used, e`1f'id"tliusy safeguard the lock against being piclmd.l

vIn the forni of key mechanism thus'de-` sented, the rib se .may be` eensideifed es sttionary' obstructor end the disks may consideredi'is both rotatable and transport?. able deteiitsfortumblersi OfV course', it 120 to be. understood. that I; do not restricttlie inyentiontothe use of a pair of disksris, distinguished' from onlyone srreiilgeela 'sdjediithtp one line of teeth ofthe key, p,nd thatl neither 'am limited tote stationiiiyflz obstructor 'and a transportable detent.` Figs@- 6 and v7 illustrate en' arrangement jwh'ere only onedetent disk Vis employedand W'lrie'eI the obstructor is roteteblefitithjthe key.

fInV `,the ,latter form the' dete'iitdisk `is 130 obstructing member, each notch adapted to be brought into registry with said edge, whereby rotation ofone member relatively to the other about the axis of the circular edge is permitted, said detent member havin a series of irregular teeth; and an indivi ual key and a master key both having teeth coniugate to the teeth of said detent, and diii'erent from one another in that the teeth of one key are located at greater disstances from the end than are the corresponding teeth of the other key by an amount equal to the circumferential distance between the said registry notches of the detent.

9. In a lock, the combination of two detent disks and an obstructing member having a circular edge intersected by notches in which the rims of said detent members lie, said members having notches adapted to be brought by rotation into registry with the edge of the obstructing member, whereupon relative rotation between the obstructing member and the detents is permitted. both detents having irregular teeth in their perimeters, in combination with a key having two sets of irregular teeth each conjugate to the teeth of one of said disks; the disks being 'in the same plane on opposite sides of the aforesaid axis, and the teeth of the key being -provided in its edges.

10. In a lock, the combination with an obstructing device having notches and two rotatable disks arranged with their rims entering said notches and themselves having notches ada ted to be brought into registry with said o structing device whereby relative rotation about the axis of said device is permitted, said disks both having irregular teeth on their perimeters adapted to be turned simultaneously by a single inserted key having two sets of teeth conjugate to the teeth of the respective disks, and one of the disks having a second notch adapted to be brought into registry with said obstructing device by a key having teeth similar to those of the aforesaid key but of which one of the'sets of teeth is displaced longitudinally with respect to the other.

11. Individual and master keys having irregular teeth in their edges similar to one another, but located at respectively diierent distances from the ends of said keys.

12. A plurality of keys each adapted to operate the same lock, one being an individual key specific to such lock, and the other being a master key adapted to operate also a number of other and specifically different locks; said keys having irregular tooth-engaging portions which are alike in the two keys, but are located in different positions in said keys.

13. A plurality of keys each adapted to operate the same lock, one being an individual key specific to such lock, and the other being a master key adapted to operate also a number of other and specifically different locks; said keys having irregular tooth-engaging rtions which are alike in the two keys, ut are located relatively farther from the end of one key than of the other.

In testimony whereof I have affixed my si gnature.

CARL I. SELLSTONE.

Uopiel of thil patent may be obtained for ive cents each, by addressing the "Commissioner of Patents, Washington, I). G. 

